Set a value to a specific textfield in the tableview row from picker.

I have a tableview row, each containing a textfield. And each text field has its own picker values.

How do i set the picker values to its specific textfield?

Because, right now, the problem i am facing is that, if i open the picker from 1st row textfield, and select the value. The selected value appear at the last row textfield instead of on 1st row textfield.